Abstract

ABRIL-SALTOS, Ricardo Vinicio et al. Germination and growth of Leonia glycycarpa in Arosemena Tola, Napo, Ecuador. Agron. Mesoam [online]. 2022, vol.33, n.1, 45656. ISSN 2215-3608.  http://dx.doi.org/10.15517/am.v33i1.45656.

Introduction. The loss of wild plants species generates the need to evaluate their germination and growth characteristics in different environments in the Amazon region. Objective. To evaluate the ex-situ germination and growth of Leonia glycycarpa under conditions of primary forest soil use and coverage of intervened areas at the Amazonian Research, Postgraduate, and Conservation Center in Arosemena Tola, Napo, Ecuador. Materials and methods. The study was developed in two phases between 2018-2020, the first, of ex-situ germination in the greenhouse, where days until emergence and growth in tray were recorded, and the second of pre-transplant growth in field, in primary forest soil use and coverage of the intervened zone (Inga sp. woodland and melatomatacea woodland). The height of the plant, stem diameter, and number of leaves up to 360 days and environmental variables such as air temperature, luminosity, and soil nutrients were recorded. Growth curves were established for plant height and stem diameter. A correlation analysis was carried out between the growth measures and the environmental and edaphic variables. Results. In the first phase, an average of 33.5 days to emergence was obtained with 76 % of plants emerged at 45 days, reaching an average of 10.7 cm in height and 3.02 mm in diameter. In the field growth, the plants located in the intervened zone reached greater development and the linear and quadratic models prevailed in plant height and linear in stem diameter. Significant correlations were found between nutrient content and temperature and growth variables. Conclusion. L. glycycarpa could be propagated under greenhouse conditions. Environmental and edaphic factors influenced growth in height, diameter and number of leaves, having greater growth cover in the intervened zone.

Keywords : forest; height; diameter; environmental factors; edaphic factors; vegetal propagation.

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